Cosel LFA10F User manual

3 Temperature Measurement Point LFA-27
4 Life expectancy and Warranty LFA-29
5 Ground LFA-31
1 Function LFA-25
2Series Operation and Parallel Operation LFA-26
1.1 Input voltage range
1.2 Inrush current limiting
1.3 Overcurrent protection
1.4 Overvoltage protection
1.5 Output voltage adjustment range
1.6 Output ripple and ripple noise
1.7 Isolation
1.8 Reducing standby power
LFA-25
LFA-25
LFA-25
LFA-25
LFA-25
LFA-26
LFA-26
LFA-26
6.1 Outline of options
6.2 Others
LFA-31
LFA-33
6 Option and Others LFA-31
2.1 Series Operation
2.2 Parallel Operation
LFA-26
LFA-27
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-24
June 26, 2020

1.1 Input voltage range
¡The range is from AC85V to AC264V or DC120V to DC370V
(please see SPECIFICATIONS for details).
¡In cases that conform with safety standard, input voltage range is
AC100-AC240V (50/60Hz).
¡
If input value doesn’t fall within above range, a unit may not operate in
accordance with specications and/or start output voltage hunting or fail.
If you need to apply a square waveform input voltage, which is
commonly used in UPS and inverters, please contact us.
¡When the input voltage changes suddenly, the output voltage ac-
curacy might exceed the specication. Please contact us.
¿ LFA10F, LFA15F, LFA30F
¡A power factor improvement circuit (active lter) is not built-in. If
you use multiple units for a single system, standards for input har-
monic current may not be satised. Please contact us for details.
¿ LFA10F, LFA15F, LFA30F, LFA50F, LFA75F,
LFA100F, LFA150F, LFA240F, LFA300F
¡Operation stop voltage is set at a lower value than that of a stan-
dard version (derating is needed).
-Use Conditions
Output ( ) 3.3V
LFA10F 5W (3W)
LFA15F 7.5W (5W)
LFA30F 10W (7.5W)
LFA50F 15W (10W)
LFA75F 25W (15W)
LFA100F 30W (20W)
LFA150F 50W (30W)
LFA240F 80W
LFA300F 100W (75W)
Input AC50V or DC70V
Duty 1s/30s
*Please avoid using continuously for more than 1 second
under above conditions. Doing so may cause a failure.
1.2 Inrush current limiting
¡An inrush current limiting circuit is built-in.
¡If you need to use a switch on the input side, please select one
that can withstand an input inrush current.
¿ LFA10F
¡Resistance for line lter is used for inrush current limiting.
¿LFA15F, LFA30F, LFA50F, LFA75F, LFA100F,
LFA150F
¡Thermistor is used in the inrush current limiting circuit. When you
turn the power ON/OFF repeatedly within a short period of time,
please have enough intervals so that a power supply cools down
before being turned on.
1 Function ¿LFA240F, LFA300F
¡Thyristor technique is used in the inrush current limiting circuit.
When you turn power ON/OFF repeatedly within a short period of
time, please have enough intervals so that the inrush current limit-
ing circuit becomes operative.
¡When the switch of the input is turned on, the primary inrush cur-
rent and secondary inrush current will be generated because the
thyristor technique is used for the inrush current limiting circuit.
1.3 Overcurrent protection
¡An overcurrent protection circuit is built-in and activated over
105% of the rated current or 101% of the peak current. A unit au-
tomatically recovers when a fault condition is removed.
Please do not use a unit in short circuit and/or under an overcur-
rent condition.
¡Hiccup Operation Mode
Hiccup operation for overcurrent protection is included in a part of
series. When the overcurrent protection circuit is activated and the
output voltage drops to a certain extent, the output becomes hic-
cup so that the average current will also decrease.
1.4 Overvoltage protection
¡An overvoltage protection circuit is built-in. If the overvoltage pro-
tection circuit is activated, shut down the input voltage, wait more
than 3 minutes and turn on the AC input again to recover the out-
put voltage. Recovery time varies depending on such factors as
input voltage value at the time of the operation.
¡In option -R2, overvoltage protection is removed by toggling ON/
OFF signal of remote control.
Remarks :
Please avoid applying a voltage exceeding the rated voltage to an
output terminal. Doing so may cause a power supply to malfunc-
tion or fail. If you cannot avoid doing so, for example, if you need
to operate a motor, etc., please install an external diode on the
output terminal to protect the unit.
1.5 Output voltage adjustment range
¡Adjustment of output voltage is possible by using potentiometer.
Please refer to instruction manual 6.1.
¡Option ”-Y” is recommended which can adjust the output voltage.
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-25 June 26, 2020

2.1 Series Operation
¿ LFA10F, LFA15F, LFA30F, LFA50F, LFA75F
¡Series operation is available by connecting the outputs of two or
more power supplies with the same output voltage, as shown be-
low. Output current in series connection should be lower than the
lowest rated current in each unit.
2 Series Operation and
Parallel Operation
¿ LFA100F, LFA150F, LFA240F, LFA300F
¡You can use a power supply in series operation. The output cur-
rent in series operation should be lower than the rated current of a
power supply with the lowest rated surrent among power supplies
that are serially connected. Please make sure that no surrent ex-
ceeding the rated current ows into a power supply.
1.6 Output ripple and ripple noise
¡Output ripple noise may be inuenced by measurement environ-
ment, measuring method g.1.1 is recommended.
1.7 Isolation
¡For a receiving inspection, such as Hi-Pot test, gradually increase
(decrease) the voltage for the start (shut down). Avoid using Hi-
Pot tester with the timer because it may generate voltage a few
times higher than the applied voltage, at ON/OFF of a timer.
1.8 Reducing standby power
¿ LFA10F, LFA15F
¡A circuit reducing standby power is built in LFA10F and LFA15F.
(standby power : 0.5W typ)
The load factor: Io=0-35%, the internal switch element is intermit-
tent operated, and the switching loss is decreased.
The specification of the Ripple/Ripple Noise changes by this
intermittent operation. The value of the ripple/ripple Noise when
intermittent operates changes in the input voltage and the output
current.
Please contact us for details.
Remarks :
When GND cable of probe with ux of magnetic force from power
supply are crossing, ripple and ripple noise might not measure
correctly.
Please note the measuring environment.
¿ LFA100F, LFA150F, LFA240F, LFA300F
¡As for option -R2, reducing standby power is possible by OFF sig-
nal of the remote control.
Please refer to instruction manual 6.1.
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
Fig.2.2 Examples of connecting in series operation (b)
D2
D4
D1
D3
Load
Power
Supply
+
-
+
-
Power
Supply
D1
D2
Load
Power
Supply
+
-
+
-
Power
Supply
12V or less 15V or more
D1-D4 : Use a schottky barrier
diode with low forward
voltage.
D1,D2 : Use a schottky barrier
diode with low forward
voltage.
Load Load
Power
Supply
+
-
Power
Supply
+
-
+Vout
-Vout
Load
150mm
C
2
C
1
Osiloscope/
Ripple noise meter
Bw:20MHz
Differential probe
+
Fig.1.1 Measuring method of Ripple and Ripple Noise
C1 : Film capacitor 0.1μF
C2 : Aluminum electrolytic capacitor 22μF
Fig.2.3 Examples of connecting in series operation
Fig.2.1 Examples of connecting in series operation (a)
*
Only LFA300F -3R3 and -5.
Use a schottky barrier diode
with low forward voltage.
(a) (b)
Load
Power
Supply
+
-
+
-
Power
Supply
LoadLoad
Power
Supply
+
-
+
-
Power
Supply
*
*
Fig.1.2. Example of measuring output ripple and ripple noise
Bad example Good example
LFA-26
June 26, 2020

Table 3.1 Temperatures of Point A, Point B LFA10F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
20%<Io[100% 70 84
Io[20% 75 79
B
Convection
20%<Io[100% 70 81
Io[20% 73 77
C
Convection
20%<Io[100% 76 80
Io[20% 76 77
D
Convection
20%<Io[100% 70 78
Io[20% 75 77
E
Convection
20%<Io[100% 73 84
Io[20% 76 79
F
Convection
20%<Io[100% 74 80
Io[20% 76 78
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.2 Temperatures of Point A, Point B
LFA15F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
40%<Io[100% 72 80
Io[40% 77 81
B
Convection
40%<Io[100% 68 73
Io[40% 74 78
C
Convection
40%<Io[100% 75 84
Io[40% 78 81
D
Convection
40%<Io[100% 71 77
Io[40% 76 79
E
Convection
40%<Io[100% 70 79
Io[40% 76 81
F
Convection
40%<Io[100% 71 78
Io[40% 76 80
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.3 Temperatures of Point A, Point B
LFA30F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
70%<Io[100% 73 73
Io[70% 79 77
B
Convection
60%<Io[100% 73 74
Io[60% 80 82
C
Convection
70%<Io[100% 80 77
Io[70% 83 80
D
Convection
70%<Io[100% 72 70
20%<Io[70% 80 77
Io[20% 79 80
E
Convection
70%<Io[100% 73 79
20%<Io[70% 79 85
Io[20% 77 81
F
Convection
70%<Io[100% 73 75
Io[70% 79 79
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
2.2 Parallel Operation
¡Parallel operation is not possible.
¡Redundancy operation is available by wiring as shown below.
¡Even a slight difference in output voltage can affect the balance
between the values of I1and I2.
Please make sure that the value of I3does not exceed the rated
current of a power supply.
I3[the rated current value
¡Environment to use it and Installation environment
When using it,it is necessary to radiate heat by the heat of the pow-
er supply.
Table 3.1 - 3.9 shows the relation between the upper limit tempera-
ture (Point A and Point B) and load factors.
Please consider the ventilation so that the convection which is
enough for the whole power supply is provided.
And temperature of Point A and Point B please become lower than
upper limit temperature.
The life expectancy in the upper bound temperature (Point A and
Point B) is three years or more.
Please refer to External View for the position of Point A and Point B.
In case of with Chassis and Cover, please contact our sales ofce
for getting more information.
Remarks:
*Please be careful of electric shock or earth leakage in case of
temperature measurement, because Point A and Point B is live
potential.
*Please refer to 4 if you want to extend the longevity of the life
expectancy.
3 Temperature
Measurement Point
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
I2
I1I3
-
+
+
-
Load
Power
Supply
Power
Supply
Fig.2.4 Example of redundancy operation
LFA-27 June 26, 2020

Table 3.4 Temperatures of Point A, Point B LFA50F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
70%<Io[100% 86 68
Io[70% 86 77
B
Convection
70%<Io[100% 72 65
Io[70% 77 70
C
Convection
50%<Io[100% 78 71
Io[50% 84 77
D
Convection
50%<Io[100% 83 68
Io[50% 85 72
E
Convection
50%<Io[100% 76 75
Io[50% 83 81
F
Convection
50%<Io[100% 80 78
Io[50% 84 76
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.5 Temperatures of Point A, Point B
LFA75F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
70%<Io[100% 85 70
Io[70% 86 76
B
Convection
70%<Io[100% 77 65
Io[70% 81 71
C
Convection
70%<Io[100% 81 68
Io[70% 83 72
D
Convection
70%<Io[100% 78 58
10%<Io[70% 80 63
Io[10% 84 72
E
Convection
70%<Io[100% 73 66
10%<Io[70% 83 68
Io[10% 83 79
F
Convection
70%<Io[100% 74 59
Io[70% 83 71
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.6 Temperatures of Point A, Point B
LFA100F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
70%<Io[100% 85 74
50%<Io[70% 88 79
Io[50% 88 83
B
Convection
70%<Io[100% 77 72
50%<Io[70% 87 82
Io[50% 88 86
C
Convection
70%<Io[100% 87 82
Io[70% 88 85
D
Convection
70%<Io[100% 80 70
Io[70% 85 80
E
Convection
70%<Io[100% 74 85
Io[70% 80 88
F Convection
70%<Io[100% 79 71
50%<Io[70% 88 77
Io[50% 88 79
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.7 Temperatures of Point A, Point B
LFA150F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
60%<Io[100% 79 75
20%<Io[60% 86 85
Io[20% 87 87
B
Convection
70%<Io[100% 75 70
30%<Io[70% 85 78
Io[30% 86 81
C
Convection
60%<Io[100% 81 75
30%<Io[60% 86 81
Io[30% 87 83
D, F
Convection
70%<Io[100% 73 67
30%<Io[70% 83 76
Io[30% 84 77
E
Convection
70%<Io[100% 73 75
30%<Io[70% 82 83
Io[30% 83 84
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
Table 3.8 Temperatures of Point A, Point B
LFA240F-O
Mounting
Method
Cooling
Method Load factor Max temperature
Point A[C] Point B[C]
A Convection
75%<Io[100% 75 70
50%<Io[75% 82 79
Io[50% 86 85
B
Convection
75%<Io[100% 63 61
50%<Io[75% 73 73
Io[50% 81 83
C
Convection
75%<Io[100% 76 73
50%<Io[75% 81 79
Io[50% 87 85
D
Convection
75%<Io[100% 66 55
50%<Io[75% 74 65
Io[50% 84 78
E
Convection
75%<Io[100% 62 62
50%<Io[75% 73 74
Io[50% 81 84
F
Convection
75%<Io[100% 68 62
50%<Io[75% 77 73
Io[50% 84 83
A,B,C,D,E,F Forced air 70%<Io[100% 75 75
Io[70% 75 75
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-28
June 26, 2020

Table 3.9 Temperatures of Point A, Point B, Point C, Point D LFA300F-O
Mounting
Method
Cooling
Method
Load factor
Max temperature
Point A[C] Point B[C] Point C[C] Point D[C]
A Convection
80%<Io[100% 70 86
60%<Io[80% 75 88
Io[60% 79 89
B
Convection
80%<Io[100% 57 68
60%<Io[80% 62 71
Io[60% 71 79
C
Convection
80%<Io[100% 69 75
60%<Io[80% 74 75
Io[60% 83 82
D
Convection
80%<Io[100% 58 62
60%<Io[80% 64 66
Io[60% 75 75
E
Convection
80%<Io[100% 57 80
60%<Io[80% 63 83
Io[60% 74 88
F
Convection
80%<Io[100% 61 68
60%<Io[80% 68 71
Io[60% 76 80
A,B,C,D,E and F
(3.3V/5V/12V/15V)
Forced air 50%<Io[100%
75 75 85 85
Io[50% 75 75 85 85
A,B,C,D,E and F
(24V/30V/36V/48V)
Forced air 50%<Io[100%
75 75 85 85
Io[50% 75 75 85 85
¡Life expectancy.
Table 4.1 Life expectancy (LFA10F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A, D , E , F Convection Ta = 40Cor less 10years or more 8years
Ta = 50C7years 4years
B, C Convection Ta = 45Cor less 10years or more 10years or more
Ta = 55C8years 6years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.2 Life expectancy (LFA15F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A, B, C, D Convection Ta = 40Cor less 10years or more 10years or more
Ta = 50C10years or more 6years
E , F Convection Ta = 35Cor less 10years or more 10years or more
Ta = 45C10years or more 6years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.3 Life expectancy ( LFA30F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A, B, C Convection Ta = 40Cor less 10years or more 8years
Ta = 50C6years 4years
D, E, F Convection Ta = 35Cor less 10years or more 10years or more
Ta = 45C10years or more 7years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.4 Life expectancy ( LFA50F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A Convection Ta = 40Cor less 10years or more 10years or more
Ta = 50C9years 5years
B , D Convection Ta = 35Cor less 10years or more 10years or more
Ta = 45C9years 6years
C, E Convection Ta = 30Cor less 10years or more 10years or more
Ta = 40C10years or more 6years
F Convection Ta = 25Cor less 10years or more 10years or more
Ta = 35C10years or more 10years or more
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.5 Life expectancy ( LFA75F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A, B Convection Ta = 40Cor less 10years or more 10years or more
Ta = 50C9years 6years
C Convection Ta = 35Cor less 10years or more 9years
Ta = 45C10years or more 5years
D Convection Ta = 30Cor less 10years or more 10years or more
Ta = 40C10years or more 7years
E, F Convection Ta = 20Cor less 10years or more 10years or more
Ta = 30C10years or more 7years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.6 Life expectancy (LFA100F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A Convection Ta = 40Cor less 10years or more 10years or more
Ta = 50C9years 6years
B, C Convection Ta = 35Cor less 10years or more 8years
Ta = 45C9years 4years
D, E , F Convection Ta = 35Cor less 10years or more 8years
Ta = 45C8years 4years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.7 Life Expectancy ( LFA150F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 10years or more 10years or more
Ta = 40C10years or more 10years or more
B Convection Ta = 25Cor less 10years or more 10years or more
Ta = 35C10years or more 10years or more
C Convection Ta = 25Cor less 10years or more 10years or more
Ta = 35C10years or more 5years
D, F Convection Ta = 25Cor less 10years or more 9years
E Convection Ta = 25Cor less 10years or more 6years
A,B,C,D,E,F Forced air Ta = 60C5years 5years
4 Life expectancy and
Warranty
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-29 June 26, 2020

Table 4.8 Life expectancy ( LFA240F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 10years or more 10years or more
Ta = 40C10years or more 10years or more
B, C Convection Ta = 20Cor less 10years or more 10years or more
Ta = 30C10years or more 10years or more
D, F Convection Ta = 20Cor less 10years or more 10years or more
E Convection Ta = 15Cor less 10years or more 10years or more
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.9 Life expectancy ( LFA300F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Life Expectancy
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 10years or more 10years or more
Ta = 40C10years or more 5years
B, C Convection Ta = 20Cor less 10years or more 10years or more
Ta = 30C10years or more 6years
D Convection Ta = 25Cor less 10years or more 10years or more
E, F Convection Ta = 20Cor less 10years or more 8years
A,B,C,D,E,F Forced air Ta = 50C5years 3years
¡Warranty
Table 4.10 Warranty
( LFA10F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A, D , E , F Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
B , C Convection Ta = 45Cor less 5years 5years
Ta = 55C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.11 Warranty ( LFA15F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A, B , C , D Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
E , F Convection Ta = 35Cor less 5years 5years
Ta = 45C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.12 Warranty ( LFA30F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A, B, C Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
D, E, F Convection Ta = 35Cor less 5years 5years
Ta = 45C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.13 Warranty ( LFA50F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
B , D Convection Ta = 35Cor less 5years 5years
Ta = 45C5years 3years
C, E Convection Ta = 30Cor less 5years 5years
Ta = 40C5years 3years
F Convection Ta = 25Cor less 5years 5years
Ta = 35C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.14 Warranty ( LFA75F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A, B Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
C Convection Ta = 35Cor less 5years 5years
Ta = 45C5years 3years
D Convection Ta = 30Cor less 5years 5years
Ta = 40C5years 3years
E, F Convection Ta = 20Cor less 5years 5years
Ta = 30C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.15 Warranty ( LFA100F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A Convection Ta = 40Cor less 5years 5years
Ta = 50C5years 3years
B, C Convection Ta = 35Cor less 5years 5years
Ta = 45C5years 3years
D, E, F Convection Ta = 25Cor less 5years 5years
Ta = 35C5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.16 Warranty ( LFA150F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 5years 5years
Ta = 40C5years 5years
B Convection Ta = 25Cor less 5years 5years
Ta = 35C5years 5years
C Convection Ta = 25Cor less 5years 5years
Ta = 35C5years 3years
D, F Convection Ta = 25Cor less 5years 5years
E Convection Ta = 25Cor less 5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-30
June 26, 2020

¿ -G
-Option -G models are low leakage current type.
-Differences from standard versions are summarized in Table 6.1.
Table 6.1 Low leakage current type
Leakage Current
(AC240V 60Hz) 0.15mA max
Conducted Noise N/A
Output Ripple Noise Please contact us for details about
Ripple Noise
*This is the value that measured on measuring board with capaci-
tor of 22μF at 150mm from output connector.
Measured by 20MHz oscilloscope or Ripple-Noise meter (Equivalent
to KEISOKU-GIKEN:RM-103).
¿ -H (LFA100F-24, LFA150F-24, LFA240F-24,
LFA300F-24/30/36/48-TY)
-Option -H models can output the peak current.
-Peak load is possible to draw as below.
Input voltage is AC90V to AC264V.
t1[10[sec]
lp[rated peak current
lave[rated output current
Duty = t1 X100[%] [35%
t1+t2
In case of LFA300F duty is depended on peak wattage.
Please contact us about the detail.
Remarks:
*There is possibility that an internal device is damaged when the
specication is exceeded.
¿ -J (LFA300F)
-Option -J models, the input and output connector are changed
to EP connectors (Mfr. Tyco Electronics).
-The appearance in option -J models are defferent from the stan-
dard models. Please contact us about the detail.
¡LFA300F（出力電圧12V以上）
I/O Connector Mating connector Terminal
CN1 7-1565036-6 1-1123722-8 Chain 1123721-1
Loose 1318912-1
CN2 1-1123723-6 1-1123722-6 Chain 1123721-1
Loose 1318912-1
CN3 1-1123723-7 1-1123722-7 Chain 1123721-1
Loose 1318912-1
(Mfr:Tyco Electeonics)
5 Ground
¡When installing the power supply with your unit, ensure that the
input FG terminal of CN1 or mounting hole FG is connected to
safety ground of the unit.
6.1 Outline of options
*Please inquire us for details of specications and delivery timing.
*You can combine multiple options. Some options, however, can-
not be combined with other options. Please contact us for details.
¿ -C
-Option -C models have coated internal PCB for better moisture
resistance.
6 Option and Others
Table 4.17 Warranty ( LFA240F-O)
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 5years 5years
Ta = 40C5years 3years
B, C Convection Ta = 20Cor less 5years 5years
Ta = 30C5years 3years
D, F Convection Ta = 20Cor less 5years 3years
E Convection Ta = 15Cor less 5years 3years
A,B,C,D,E,F Forced air Ta = 60C5years 3years
Table 4.18 Warranty ( LFA300F-O )
Mounting
Method
Cooling
Method
Average ambient
temperature (year)
Warranty
Io[75%
75%<Io[100%
A Convection Ta = 30Cor less 5years 5years
Ta = 40C5years 3years
B, C Convection Ta = 20Cor less 5years 5years
Ta = 30C5years 3years
D Convection Ta = 25Cor less 5years 3years
E
, F Convection Ta = 20Cor less 5years 3years
A,B,C,D,E,F Forced air Ta = 50C5years 3years
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
t
1
t
2
l p
l
ave
: average current
: peak current
Output current [A]
Fig.6.1 Peak current
LFA-31 June 26, 2020

¿ -J1
-Option -J1 models, the Input and Output connector is VH con-
nectors (Mfr. J.S.T.).
-LFA300F appearance of option -J models are defferent from the
standard appearance. Please contact us about the detail.
¡LFA10F,LFA15F
I/O Connector Mating connector Terminal
CN1 B3P5-VH VHR-5N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B2P-VH VHR-2N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T.)
¡LFA30F,LFA50F
I/O Connector Mating connector Terminal
CN1 B3P5-VH VHR-5N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B4P-VH VHR-4N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T)
¡LFA75F
I/O Connector Mating connector Terminal
CN1 B3P5-VH VHR-5N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B6P-VH VHR-6N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T)
¡LFA100F
I/O Connector Mating connector Terminal
CN1 B3P5-VH VHR-5N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B8P-VH VHR-8N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T)
¡LFA150F,LFA240F
I/O Connector Mating connector Terminal
CN1 B3P5-VH VHR-5N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B6P-VH VHR-6N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN3 B7P-VH VHR-7N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T)
¡LFA300F
I/O Connector Mating connector Terminal
CN1
B6P(8-3.6)-VH VHR-8N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN2 B6P-VH VHR-6N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
CN3 B7P-VH VHR-7N Chain SVH-21T-P1.1
Loose BVH-21T-P1.1
(Mfr:J.S.T)
¿ -S--SN
--S indicates a type with chassis, and -SN indicates a type with
chassis and cover (Refer to external view). Refer to “Derating”
and Section 3.
-Please contact us about the detail of LFA300F.
¿ -SNF (LFA300F-5/12/24-TY)
-In option -SNF, the cover, chassis and cooling fan are added.
-The appearance of option -J models are defferent from the of
standard appearance. Please contact us about the detail.
-Oil and other chemical liquid splashing environment may cause
the performance degradation and failure.
¿ -Y
-Option -Y models can adjust the output voltage by the potenti-
ometer is attached .
-Refer to the adjustable range to the table 6.2 and table 6.3.
¡LFA10F, LFA15F, LFA30F, LFA50F, LFA75F
Table 6.2 Output voltage adjustment range
Output voltage Output voltage adjustment range[V]
3.3V*2.85 to 3.63
5V 4.5 to 5.5
12V 10.8 to 13.2
15V 13.5 to 16.5
24V 21.6 to 26.4
36V 32.4 to 39.6
48V 43.2 to 52.8
*Some of the product, -Y is standard equipment.
(LFA10F-3R3-Y,LFA15F-3R3-Y,LFA30F-3R3-Y,
LFA50F-3R3-Y,LFA75F-3R3-Y)
¡LFA100F, LFA150F, LFA240F, LFA300F
Table 6.3 Output voltage adjustment range
Output voltage Output voltage adjustment range[V]
3.3V*2.85 to 3.63
5V*4.5 to 5.5
12V 10.8 to 13.2
15V 13.5 to 16.5
24V 21.6 to 27.5
30V (LFA300F) 27.0 to 33.0
36V 32.4 to 39.6
48V 39.6 to 52.8
*Some of the product, -Y is standard equipment.
(LFA100F-3R3-Y, LFA100F-5-Y,
LFA150F-3R3-Y, LFA150F-5-Y, LFA300F-O-TY)
-To increase an output voltage, turn a built-in potentiometer
clockwise.
-To decrease the output voltage, turn it counterclockwise.
-Please take care when you adjust output voltage by potenti-
ometer, because there is possibility of electric shock and the
breakdown as contacting to other internal circui by telectrically
conductive tool.
¿ -R (LFA100F, LFA150F, LFA240F, LFA300F)
-You can control output ON/OFF remotely in Option -R models.
To do so, connect an external DC power supply and apply a
voltage to a remote ON/OFF connector, which is available as
option.
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-32
June 26, 2020

Model Name
Built-in
Resistor
Ri [ W]
Voltage between RC (+)
and RC (-) [V]
Input
Current
[mA]
Output ON Output OFF
LFA100F, LFA150F,
LFA240F, LFA300F 780 4.5 - 12.5 0 - 0.5 20max
-
Dedicated harnesses are available for your purchase. Please
see Optional Parts for details.
*1 If the output of an external power supply is within the range
of 4.5 - 12.5V, you do not need a current limiting resistor R. If
the output exceeds 12.5V, however, please connect the cur-
rent limiting resistor R.
To calculate a current limiting resistance value, please use the fol-
lowing equation.
R[W]=
*
Please wire carefully. If you wire wrongly, the internal components
of a unit may be damaged.
¡Remote ON/OFF circuits (RC+ and RC-) are isolated from input,
output and FG.
¿ -R2 (LFA100F, LFA150F, LFA240F, LFA300F)
-The usege is the same as option -R, please refer to Option -R.
-Reducing standby power is possible by OFF signal of the re-
mote control.
-Start up time by ON signal in remote control is 350ms(typ).
-The latch condition in overvoltage protection is removed by tog-
gling ON/OFF signal of remote control.
-Standby power
LFA100F,LFA150F,LFA240F
0.2Wtyp (AC100V), 0.7Wtyp (AC200V)
LFA300F
0.25Wtyp (AC100V), 1.1Wtyp (AC200V)
¿ -T (LFA240F, LFA300F)
-Option -T models have vertically positioned screws on a termi-
nal block.
-Please contact us for details about appearance.
Fig.6.2 Example of using a remote ON/OFF circuit
Ri
RC (-)
RC (+)
2
1
*1
RSW
External Power
Source
Remote ON/OFF connector (Optional)
Input Current
Inside of a Power
Supply
Vcc-(1.1+RiX0.005)
0.005
FG
AC (N)
AC (L)
-V
+V
Fig.6.3 Example of option -T
¡The screw can be held to terminal block by inserting and lifting the
screwdriver from the side of terminal block.
¿ -T1 (LFA300F)
-Option -T models have horizontally positioned screws on a ter-
minal block.
-Please contact us for details about appearance.
6.2 Others
¡This power supply is the rugged PCB type. Do not drop conduc-
tive objects in the power supply.
¡At light load, there remains high voltage inside the power supply
for a few minutes after power OFF.
So, at maintenance, take care about electric shock.
¡This power supply is manufactured by SMD technology. The
stress to PCB like twisting or bending causes the defect of the
unit, so handle the unit with care.
-Tighten all the screws in the screw hole.
-Install it so that PCB may become parallel to the clamp face.
-Avoid the impact such as drops.
¡While turning on the electricity, and for a while after turning off,
please don’t touch the inside of a power supply because there are
some hot parts in that.
¡When a mass capacitor is connected with the output terminal
(load side), the output might become the stop or an unstable oper-
ation. Please contact us for details when you connect the capaci-
tor.
¿ LFA10F, LFA15F
¡When these power supplies are connected to the input terminal in
parallel, the total capacitance between line and line becomes big.
Therefore, the electrical discharge resistance on the safety stan-
dard might become necessary.
Please contact us for details when safety standard is necessary at
multiple units usage.
Fig.6.4 lifting method
+ screwdriver
terminal block
screw
f5.5MAX
Fig.6.5 Example of option -T1
FG
AC (N)
AC (L)
-V
+V
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-33 June 26, 2020